Feature1.Top width:30mm.Bottom width:30mm. Thick:25mm.
3. Holder's hole with 510 thread. Suit for 510 tank. Two-sides can be used.
4.About us, Professional factory, welcome to our store for more choices with best price. What we pursue is your satisfaction of our service, not just for our goods. For any reason you are unsatisfied with our product at any time, simply contact support for exchange or refund. We will reply you about any question you ask within 24 hours.